挤压过程数字模拟的双重网格技术

双重网格技术是将有限元计算用网格与材料质点网格分开,通过两层网格的信息传递,可将有限元网格上的位移、速率、应变速率映射到材料质点网格上去.采用这种方法,避免了大变形中需多次重新生成网格的问题,大大缩短了上机时间,同时还能直观反映各质点从变形开始到变形结束时的位移.

Double Mesh Technique for the Mumerical Simulation of Extrusion Process

Double mesh technique builds the mesh for FEM calculation and the mesh for material mass node individually. Through the tranmission of the two mesh system's information, the displacement,velocity and strain rate can be transmitted from the FEM mesh to the mesh of material mass node. In the large deformation problem solving,this makes it free of rebuildingmesh from time to time and save computing time and can show each mass node's displacement throughout the deformation process.